GF27.51-P-1001AHI Start-Up Clutch, Component Description

GF27.51-P-1001AHI Start-up clutch, component description
- TRANSMISSION 722.930

Component Identification:

Location
The start-up clutch is permanently bolted to the flywheel in the transmission bell housing.

Task
When the vehicle is stationary and at idle speed the start-up clutch interrupts the power flow between the engine and transmission and causes continuous rpm and torque adjustment when starting up.

Component Identification:

Function
In the event of an actuation triggered by the fully integrated transmission control unit (VGS) (Y3/8n4) the oil pressure controlled by the start-up clutch control solenoid valve (Y3/8y9) is lead through the drive shaft to the pressure chamber behind the piston. The clutch plates are pressed together by means of clutch pistons so that the engine torque can be transmitted. The pressure in the clutch piston is adjusted via the start-up clutch control solenoid valve.

The start-up clutch is engaged in all gears depending on the engine speed and engine load. The torsional damper damps the vibrations coming from the engine. This improves comfort for the driver and saves wear and tear on the mechanical components of the transmission.